Piston-rod packing



(No Model.)

J. LISTER. PISTON ROD PACKING.

-No.524,831. PatentedAug.21,1894.

INVEN'TUR:

PATENT OFFICE.

JOSEPH LISTER, OF CHICAGO, ILLINOIS.

PISTON,-RODPACKING.

SPECIFICATION forming part of Letters Patent No. 524,831, dated August 21 1894..

Application filed May 19,1894. Serial No. 511,787. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH LISTER, a citizen of the United States, residing at Chicago, n the county of Cook and State of Illinois, have lnvented certain new and useful Improvements in Piston-Rod Packing; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

Flgure l is a vertical section showing part of an engine cylinder, and also the piston, the plston-rod and some of the adjuncts. Fig. 2 1s a view of the packing tube detached, and showing part of the compressing device in section. Fig. 3 is an end view of that shown in Fig. 2. Fig. 4 is alongitudinal section of the tube.

In the drawings, A indicates a portion of an engine cylinder sufficient to illustrate the manner of applying my invention thereto. It s provided with a cylinder-head A bolted at a 1n substantially the usual way. The head has an outward extending boss or packing-box A provided with an internal thread a, there beingan aperture at a through the head so that the rod B of the piston B can readily nut-like collar placed concentric with the, shaft and turned on the conical thread to compress the metal.

I have found that under some circumstances, as for instance with large engines, it is advantageous to apply the compression in a difierent way, that is to say, apply it without requiring the slipping or moving longitudinally of the compression device along the surface of the cone. In order toapply the compressing power to greater advantage in such casesI employmeans such as are herein shown.

0 indicates the packing-tube as a whole, it having the inner cylindrical threaded part c, 5 5

the central polygonal flanged part c and the exterior smooth surfaced cone c These parts 0, c, o are cast integral, of suitable metal, I at present preferring Babbitt-metal.

Any substance can be employed which can extending arms d d provided with bolt ap-' ertures at (1 The arms (1 can be placed opposite to the corresponding parts of the adjacent sections, and can be drawn together 75 by the bolt ol passing through the aperture 01 With a mechanism of this sort a very powerful compression can be exerted without the necessity of exerting any force to cause the compression device D D to move longitudinally of the cone Therefore a thicker cone can be treated, as the metal can be delicately crowded inward or allowed to expand as required inorder to properly regulate the degree of tightness of the packing.

- What I claim is- In a piston-rod packing, the combination with the cylinder head and the packing box A, of the packing tube 0 having the cylindrical threaded part c which engages with the pack- 9 0 ing box, the flange c and the smooth surfaced cone 0 the three-part compression device, each part D being adapted to press radially against the said cone, and the screw-threaded clamping mechanism for drawing together 5 the sections of the compressing device and acting in planes transverse to the axis of the cone, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOSEPH LISTER.

Witnesses:

E. R. BLIss, Lonmc W. PosT. 

